[ath] AR9227 hang: ath_rate_findrate: switching quickly..

[Alex Deiter]

Hello Adrian,

Yes, this always appear. In chronological order, this can be described as
follows:

1. system reboot
2. for several hours, all clients can successfully associate and works fast
3. transfer rate is reduced and there are increasing messages:

ath0: stuck beacon; resetting (bmiss count 4)
ath0: stuck beacon; resetting (bmiss count 4)
ath0: stuck beacon; resetting (bmiss count 4)
ar5416StopDmaReceive: dma failed to stop in 10ms
AR_CR=0x00000024
AR_DIAG_SW=0x42000020
ath0: stuck beacon; resetting (bmiss count 4)
ath0: stuck beacon; resetting (bmiss count 4)
ath0: stuck beacon; resetting (bmiss count 4)

4. finally connections are interrupted and customers can no longer be
 associated

I use TP-LINK TL-WN851ND v1:

http://www.tp-link.us/products/details/?categoryid=&model=TL-WN851ND
https://wikidevi.com/wiki/TP-LINK_TL-WN851ND

Thank you very much!


2014-09-07 1:03 GMT+04:00 Adrian Chadd <adrian.chadd at gmail.com>:

> Hi!
>
> On 6 September 2014 02:39, Alex Deiter <alex.deiter at gmail.com> wrote:
> > Hello Adrian,
> >
> > Today the network adapter completely hung with messages:
> >
> > Sep  6 13:26:19 blackbird kernel: ar5416PerCalibrationN: NF calibration
> > didn't finish; delaying CCA
> > Sep  6 13:26:49 blackbird kernel: ar5416PerCalibrationN: NF calibration
> > didn't finish; delaying CCA
> > Sep  6 13:27:19 blackbird kernel: ar5416PerCalibrationN: NF calibration
> > didn't finish; delaying CCA
> > Sep  6 13:27:49 blackbird kernel: ar5416PerCalibrationN: NF calibration
> > didn't finish; delaying CCA
> >
> > and clients can not connect.
>
> Does this always appear when it hangs?
>
> That means the baseband has gone receive deaf and locked up.
>
> Lemme go find an AR9227 to throw in a test AP here and reproduce. I
> remember seeing this in the past, so I should be able to reproduce it
> relatively easily.
>
> Thanks!
>
>
> -a
>



-- 
Alex Deiter